IEC 62496-4:2011

Optical circuit boards - Part 4: Interface standards - General and guidance

IEC 62496-4:2011 covers general information on the subject of Optical Circuit Board (OCB) interfaces. It includes normative references, definitions and rules for creating and interpreting the standard drawings.

Cartes à circuits optiques - Partie 4: Normes d'interface - Généralités et lignes directrices

La CEI 62496-4:2011 couvre les informations générales relatives aux interfaces de Cartes à Circuit Optique (OCB). Elle inclut des références normatives, des définitions et des règles pour créer et interpréter les schémas normalisés.

General Information

• Status: Published
• Publication Date: 25-Jan-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160.10 - Components for rotating machines
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: TC 86 - Fibre optics
• Drafting Committee: JWG 9 - TC 86/JWG 9
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2011
• Completion Date: 26-Jan-2011

Standards Content (Sample)

IEC 62496-4 ®
Edition 1.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical circuit boards –
Part 4: Interface standards – General and guidance

Cartes à circuits optiques –
Partie 4: Normes d'interface – Généralités et lignes directrices

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IEC 62496-4 ®
Edition 1.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical circuit boards –
Part 4: Interface standards – General and guidance

Cartes à circuits optiques –
Partie 4: Normes d'interface – Généralités et lignes directrices

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 33.180.01 ISBN 978-2-88912-317-9
– 2 – 62496-4  IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 General definitions . 6
3.2 Core shape definitions . 7
4 Coordinates of I/O ports of waveguide OCB . 9
4.1 Structural types of waveguide OCB . 9
4.2 Origin point and coordinate axis . 11
4.2.1 General . 11
4.2.2 Origin point and coordinate axis by internal coordinate . 12
4.2.3 Origin point and axis by external coordinate . 14
4.2.4 Origin point and axis employing both internal and external
coordinates. 15
5 Misalignment angle of I/O ports . 16
5.1 General . 16
5.2 Misalignment angle of I/O port in edge type . 16
5.3 Misalignment angle in surface type I/O port . 18
6 Mirror angle . 19
7 Hole . 21
8 Dimensioning system . 22
9 Gauges . 22
10 Tolerance grade of the OCB . 22
10.1 General . 22
10.2 Shape accuracy of the OCB body of fibre flexible OCB . 23
10.3 Position accuracy of the OCB port/I/O port of fibre flexible OCB . 23
10.4 Length accuracy of the OCB tails of fibre flexible OCB . 24
Annex A (normative) OCB interfaces . 25
Annex B (informative) Example of the OCB . 28
Bibliography . 30

Figure 1 – Examples of shapes of square core (quasi-square made by extrapolation or

interpolation) . 8
Figure 2 – Examples of shapes of circular core . 8
Figure 3 – Six structural parameters of square core shape of waveguide OCB . 9
Figure 4 – Example of OCB with end face I/O ports at edge of board . 10
Figure 5 – Example of OCB with end face I/O type. 10
Figure 6 – Example of OCB with surface I/O ports . 11
Figure 7 – Example of OCB with surface I/O ports . 11
Figure 8 – Definition of origin point 1): A specific port is used as the origin point . 12
Figure 9 – Definition of origin point 2): Determination of an origin point at a place
where there is no port (a mid-point of adjacent two ports at the centre of bottom line is
used as the origin) . 13

62496-4  IEC:2011 – 3 –
Figure 10 – Definition of the direction of coordinate axis 1): Use the direction of
alignment of multiple ports . 13
Figure 11 – Definition of direction of coordinate axis 2): Along a specific optical circuit
(only if the wire is recognizable). 13
Figure 12 – Origin point and coordinate axis (1) . 14
Figure 13 – Origin point and coordinate axis (2) . 14
Figure 14 – Origin point and direction of coordinate axis (combination of Figure 12 and
Figure 13) . 15
Figure 15 – Use of both internal coordinate and external coordinate systems: Internal
for the origin point (a specific optical input/output port) and external for the direction of
the axis (dedicated structures) . 15
Figure 16 – Use of both internal coordinate and external coordinate systems: Internal
for the origin point (coordinates of a specific optical input/output port) and external for
the direction of the axis (periphery of the board) . 16
Figure 17 – Definition of misalignment angle of I/O port in edge type . 17
Figure 18 – Definition of vertical and horizontal rotational misalignment angle of I/O
port in edge type . 17
Figure 19 – Definition of misalignment angle of I/O port in surface type . 18
Figure 20 – Definition of longitudinal and lateral misalignment angle of I/O port in
surface type . 19
Figure 21 – Mirror angle 1 . 19
Figure 22 – Mirror angle 2 . 19
Figure 23 – Mirror angle 3 . 20
Figure 24 – Mirror angle 4 . 20
Figure 25 – Mirror tilt angle . 21
Figure 26 – Example of optical alignment hole . 21
Figure 27 – Hole and objects to be measured . 22
Figure 28 – Classification of shape accuracy of OCB body of fibre flexible OCB . 23
Figure B.1 – Example of the fibre flexible OCB . 28
Figure B.2 – Origin point and coordinate for the fibre flexible OCB . 29

Table 1 – The coordinate system, origin point and coordinate axis . 12

– 4 – 62496-4  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL CIRCUIT BOARDS –
Part 4: Interface standards –
General and guidance
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC
...